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United States Patent | 5,119,385 |
Aoshima ,   et al. | June 2, 1992 |
Light input means inputs exciting pulse light beams to a parametric oscillator simultaneously in a plurality of directions. The parametric oscillator including a parametric element such as a urea crystal produces parametric pulse beams having different wavelengths. The parametric pulse beams are corrected into coaxial beams by a correcting optical means which includes an optical fiber, and then group dispersion of the coaxial beams are compensated for by a group dispersion compensating means which includes opposed diffraction gratings.
Inventors: | Aoshima; Shinichiro (Shizuoka, JP); Suzuki; Hideo (Shizuoka, JP) |
Assignee: | Hamamatsu Photonics K. K. (Shizuoka, JP) |
Appl. No.: | 561981 |
Filed: | August 1, 1990 |
Aug 03, 1989[JP] | 1-202220 | |
Sep 22, 1989[JP] | 1-247282 |
Current U.S. Class: | 372/23; 359/330; 372/21; 372/25; 372/101; 372/102; 385/123 |
Intern'l Class: | H01S 003/108 |
Field of Search: | 372/21,25,102,23,18,101,10 307/425,478 350/96.29,30 |
3720884 | Mar., 1973 | Kelley et al. | 372/25. |
4200846 | Apr., 1980 | Stark, Jr. et al. | 372/25. |
4250465 | Feb., 1981 | Leib | 372/21. |
4349907 | Sep., 1982 | Campillo et al. | 372/21. |
4639923 | Jan., 1987 | Tang et al. | 372/21. |
4764930 | Aug., 1988 | Bille et al. | 372/23. |
4914663 | Apr., 1990 | Basu et al. | 372/18. |
Foreign Patent Documents | |||
0233416 | Sep., 1989 | JP | 372/21. |
Piskarskas et al., "New Instruments and Measurement Methods", Sov. Phys. Usp., 29(9), Sep. 1986, pp. 869-879. Wachman et al., "Continuous-Wave Mode-Locked and Dispersion-Compensated Femtosecond Optical Parametric Oscillator", Optics Letters, vol. 15, No. 2, Jan. 15, 1990, pp. 136-138. Vasilyauskas et al., "Self-Compression of Femtosecond Light Pulses in Media with a Quadratric Nonlinearity Under Conditions of a Group Velocity Mismatch", Sov. J. Quantum Electron, 18(4), Apr. 1988, pp. 518-521. Piskarskas et al., "Picosecond Optical Parametric Oscillator Pumped by Temporally Compressed Pulses From a Q-Switched, Mode-Locked, CW-Pumped Nd: YAG Laser", Optics Letters, Jun. 1, 1989, vol. 14, No. 11, pp. 557-559. Vanherzeele et al., "Widely Tunable Parametric Generation in Beta Barium Borate", Applied Optics, vol. 27, No. 13, Jul. 1988, pp. 2634-2636. Fan et al., "Visible BaB204 Optical Parametric Oscillator Pumped at 3565 nm by a Single-Axial-Mode Pulsed Source", Appl. Phys. Lett., 53(21), Nov. 1988, pp. 2014-2016. Burdulis et al., "Visible Optical Parametric Oscillation in Synchronously Pumped Beta-Barium Borate", Optics Communications, vol. 74, No. 6, Jan. 1990, pp. 398-402. Edelstein et al., "Broadly Tunable High Repetition Rate Femtosecond Optical Parametric Oscillator," Appl. Phys. Lett., 54(18), May 1989, pp. 1728-1730. Cheng et al., "Broadly Tunable Optical Parametric Oscillation in .beta.-Bab204", Appl. Phys. Lett., 53(3), Jul. 1988, pp. 175-177. A. Piskarskas et al., "Parametric Chirp and 20-Fold Compression of Pulses From a Quasi-cw Picosecond Optical Parametric Oscillator", Sov. J. Quantum Electron., vol. 15, No. 11, Nov., 1985, pp. 1539-1541. L. J. Bromley et al., "Synchronously Pumped Optical Parametric Oscillation in Beta-Barium Borate", Optics Communications, vol. 67, No. 4, Jul. 15, 1988, pp. 316-320. H. Itoh et al., "Optical Pulse Compression in 1.5 .mu.m Wavelength Region Using Large-Positive-Dispersion Fibre and Grating Pair", vol. 24, No. 13, Jun. 23, 1988, pp. 785-786. |